摘要
Songliao is one of the large continental oil basins of Eastern China covering an area of 260,000 km^2. It is a new type of introcratonic complex basin. The Upper Jurassic Series and whole Cretaceous have well developed upon the pre-Mesozoic folded base. The Upper Jurassic and Cretaceous Taonan Fro., Shahezi Fro. and Yingcheng Fro. are composed of volcanic rocks, volcanic clastic rocks and